OsmAnd~

Offline OpenStreetMap maps and navigation.
Converted Android F-Droid version: https://f-droid.org/repo/net.osmand.plus_212.apk
Notes/Issues:
- Map download only worked for me with Chrome Beta.
- Performance is very bad compared to Android. Consider using online tiles for faster browsing while online.
- Available local storage free is always shown as 1GB. You can still download more than 1GB of offline maps though.